Node Jimp | scale
Introduction : The scale() function is an inbuilt function in Nodejs | Jimp which uniformly scales the image by a factor.
Syntax:
scale(scale, mode, cb)
Parameter:
- scale – This parameter stores the scaling factor of the image.
- mode – This is optional parameter which stores the scaling method.
- cb – This is optional parameter which is invoked when compilation is complete.
Input Images:
Setup Environment :
npm init -y
Install Dependencies :
npm install jimp
Example 1:
javascript
// npm install --save jimp // import jimp library to the environment var Jimp = require( 'jimp' ); // User-Defined Function to read the images async function main() { const image = await Jimp.read( ' // scale Function having scaling factor as 0.2 image.scale(.2) .write( 'scale1.png' ); } main(); console.log( 'Image Processing Completed' ); |
Output:
Example 2: With mode and cb (optional parameters)
javascript
// npm install --save jimp // import jimp library to the environment var Jimp = require( 'jimp' ); // User-Defined Function to read the images async function main() { const image = await Jimp.read( ' // scale Function having scaling-factor, mode and callback function image.scale(3, Jimp.RESIZE_BEZIER, function (err){ if (err) throw err; }) .write( 'scale2.png' ); } main(); console.log( 'Image Processing Completed' ); |
Output:
Reference: https://www.npmjs.com/package/jimp
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